Related Clues:

• Secretly watches
• Intelligence operatives
• Some enemies of the state
• M's men
• Secret observers
• Works in intelligence
• Moles, e.g.
• Nathan Hale and others
• Bond and Bourne
• Smart and Bond, for instance
• Smiley, et al.
• Black-clad and white-clad Mad adversaries
• Parts of some rings
• CIA types
• Undercover agents